package com.hspedu.collection_;
/*
 *@auther will
 *@version 1.0
 */

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;

public class Collection_ {
    @SuppressWarnings("all")
    public static void main(String[] args) {

        ArrayList arrayList = new ArrayList();
        arrayList.add("jack");
        arrayList.add("tom");

        HashMap hashMap = new HashMap();
        hashMap.put("N01","北京");
        hashMap.put("No2","上海");
    }
}
